dashboard: minor comment fixes

These were responses to comments in a prior CL that I neglected
to mail.

Change-Id: I9a68fe743ad8cb39860250da0fc2f06215270880
Reviewed-on: https://go-review.googlesource.com/c/build/+/377454
Trust: Jonathan Amsterdam <jba@google.com>
Run-TryBot: Jonathan Amsterdam <jba@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
diff --git a/dashboard/builders.go b/dashboard/builders.go
index 68922a0..84c9a72 100644
--- a/dashboard/builders.go
+++ b/dashboard/builders.go
@@ -3037,7 +3037,7 @@
 // should be run given a project, branch and goBranch.
 type isBuilderFunc func(conf *BuildConfig, proj, branch, goBranch string) bool
 
-// buildsForProject returns the builders that should be run for the given project,
+// buildersForProject returns the builders that should be run for the given project,
 // using isBuilder to test each builder.
 // See TryBuildersForProject for the valid forms of proj, branch and goBranch.
 func buildersForProject(proj, branch, goBranch string, isBuilder isBuilderFunc) []*BuildConfig {
diff --git a/dashboard/builders_test.go b/dashboard/builders_test.go
index 8717c34..6dc8291 100644
--- a/dashboard/builders_test.go
+++ b/dashboard/builders_test.go
@@ -317,8 +317,9 @@
 }
 
 // TestPostSubmit tests that a given repo & its branch yields the provided
-// complete set of post-submit builders. See also: TestBuilderConfig, which
-// tests both trybots and post-submit builders, both at arbitrary branches.
+// complete set of post-submit builders. See also: TestTrybots, which tests only
+// trybots, and TestBuilderConfig, which tests both trybots and post-submit
+// builders, both at arbitrary branches.
 func TestPostSubmit(t *testing.T) {
 	tests := []struct {
 		repo   string // "go", "net", etc